The optimization of signal detectability in digital fluoroscopy

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Abstract
An optimization analysis of digital fluoroscopy was carried out using (signal/noise)2/dose as a figure of merit. Three signal detection tasks have been considered: small I-containing blood vessels; regions of fat; and microcalcifications. The effects of X-ray beam filtration and kilovoltage on the figure of merit were parameterized and the associated X-ray tube power loadings were defined. Results are presented in a fashion that facilitates the choice of parameters (amount of Al filtration, kilovoltage, and X-ray tube power loading) such that an acceptable balance can be achieved between signal detection sensitivity, patient dose and X-ray tube power loading.

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